document$.subscribe(({ body }) => {
  renderMathInElement(body, {
    delimiters: [
      { left: '$$', right: '$$', display: true },
      { left: '$', right: '$', display: false },
      { left: '\\(', right: '\\)', display: false },
      { left: '\\[', right: '\\]', display: true },
    ],
  });
});
